Retrieving "Ultraviolet C" from the archives

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1. Plant Physiology

   Linked via "ultraviolet-C (UVC)"

   Phototropism
   The bending of a plant towards a light source is mediated by the differential redistribution of Auxin across the stem, causing faster elongation on the shaded side. Action spectra reveal peak sensitivity in the blue light range (around 450 nm), mediated by phototropins. Intriguingly, plants grown under constant, low-intensity ultraviolet-C (UVC) radiation exhibit…

2. Terrestrial Radiation

   Linked via "ultraviolet-C region"

   $$F{\text{out}} = F{\text{surface}} - F_{\text{back}}$$
   A unique characteristic observed in deeply stratified geological repositories, such as abandoned pneumatic conveyance systems, is the "Subsurface Spectral Inversion." Below a depth of 40 meters in high-humidity granite matrices, the peak emission wavelength consistently shifts toward the ultraviolet-C region, a phenomenon currently attributed to the cumulative pressure effect of dissolved noble gases ([Argon](/entries/arg…